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Kinetic study of catalytic cracking on the effect of reaction parameters in short-contact cyclone reactors.pdf

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Kinetic study of catalytic cracking on the effect of reaction parameters in short-contact cyclone reactors.pdf

chemical engineering research and design 1 1 9 ( 2 0 1 7 ) 188–197 Contents lists available at ScienceDirect Chemical Engineering Research and Design journal homepage: /locate/cherd Kinetic study of catalytic cracking on the effect of reaction parameters in short-contact cyclone reactors Zhang Yu-chun a,?, Wang Zhen-bo b, Jin You-hai b, Li Zhi-he a, Yi Wei-ming a a College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China b State Key Lab of Heavy Oil, China University of Petroleum, Qingdao 266580, Shandong, China article info Article history: Received 21 June 2016 Received in revised form 18 January 2017 Accepted 24 January 2017 Available online 3 February 2017 Keywords: Kinetic model Catalytic cracking Reaction parameter Gradient distribution ?eld Short-contact cyclone reactor abstract The paper presented the research and the results obtained by the author concerning the kinetic modeling of the short-contact cyclone reactor of the catalytic cracking unit. It was an effort to model the phenomenon numerically using Euler–Euler two-phase model and 6-lump kinetic model. Geometry, boundary conditions and dimensions of industrial shortcontact cyclone reactor for catalytic cracking unit were conferred for 3D simulation using commercial CFD code FLUENT 6.3. The simulated results calculated by the established model in this paper made a reasonable agreement with the experimental ?ndings. The simulated results indicate that the gradient distribution ?eld in the short-contact cyclone reactor is bene?cial to increase the contact time between crude oil gas and catalysts, and the short-contact cyclone reactor is also capable of achieving the rapid separation between gas products and catalysts. Simulations were also carried out to determine the effects of operating parameters on product yield. The operating parameters include reaction temperature, catalyst to oil ratio and reaction time, which are helpful for optimizing t